Problem

After an in-place upgrade from Windows 7 to Windows 10, Net Express fails to launch with the following unexpected error:

Solution

This is a known issue where the Windows upgrade corrupts the Net Express installation, and this causes Net Express to fail to start.

The Net Express installation must be repaired or reinstalled.

Here are the steps for the repair:
1. Go to Control Panel > Program and Features
2. Right-click Micro Focus Net Express 5.1
3. Click Repair
4. Click Yes to allow NXP32MSI to update software

If the repair does not resolve the problem, the next step is to uninstall and reinstall Net Express.

Note: Make sure to retain the license when prompted to retain or revoke the license at the beginning of the uninstall process.